Networking Archives - Page 14 of 15

Networking tutorial - IT technology blog

VLAN Configuration Basics: What I Learned Getting Paged at 2 AM

March 16, 2026

A hands-on VLAN configuration guide built from real production incidents — covering access ports, trunk ports, inter-VLAN routing, and a 5-minute pre-change checklist that prevents 2 AM outages.

Networking

OSI Model 7 Layers Explained Simply: A DevOps Engineer’s Practical Guide

March 14, 2026

Understanding the OSI Model is a cornerstone of networking. This guide breaks down the 7 layers with real-world examples and practical advice, helping you master this essential skill for troubleshooting and system design.

Networking

SSL/TLS Explained: Fortify Your Servers with Let’s Encrypt Setup Guide

March 13, 2026

Secure your web applications with this comprehensive guide to SSL/TLS and Let's Encrypt. Learn how to quickly set up free certificates using Certbot, deep dive into encryption protocols, and master advanced configurations for production stability. Practical tips included for seamless automation.

Networking

Mastering NAT & Port Forwarding: A Practical Deep Dive

March 13, 2026

Understanding NAT and Port Forwarding is crucial for any IT professional managing network access. This guide delves into their practical applications, offering a step-by-step implementation for securing and exposing network services.

Networking

Wireshark: Essential Network Packet Analysis for IT Professionals

March 11, 2026

This tutorial guides IT professionals in using Wireshark for network packet analysis. Learn about installation, effective capture and display filters, and practical troubleshooting techniques to diagnose network and application issues with precision.

Networking

A Practical Guide to Configuring a Linux Firewall: iptables vs. nftables

March 9, 2026

Secure your new Linux server by setting up a firewall. This guide explains why a firewall is essential, compares the classic iptables with the modern nftables, and provides a production-ready nftables configuration to get you started.

Networking

How to Set Up OpenVPN Server on Ubuntu: A Practical Guide

March 8, 2026

Setting up OpenVPN on Ubuntu means building a PKI, configuring server certificates, and generating per-client .ovpn files. This guide covers each step with real commands and the practical details that documentation usually leaves out.

Networking

How DNS Works: A Complete Guide for Developers and DevOps Engineers

March 7, 2026

DNS is the backbone of every internet connection — invisible until it breaks. This guide walks through how DNS resolution actually works, the key record types every developer should know, and the practical commands that make debugging fast and reliable.

Networking

How to Set Up a DHCP Server on Linux: A Field-Tested Guide

March 7, 2026

A field-tested guide to setting up a DHCP server on Linux using dnsmasq for quick deployments and ISC DHCP for production environments. Covers static leases, multi-subnet config, PXE boot, failover, and monitoring tips learned from six months of real-world use.

Networking

TCP vs UDP: Key Differences and When to Use Each in Your Network Stack

March 7, 2026

TCP guarantees delivery and ordering through a handshake and retransmission; UDP skips all that for raw speed. Knowing when to pick each protocol — and how to verify what your stack is actually doing — is foundational networking knowledge every engineer needs.